Assuming you mean NMS rather than NMA, then there is a page there with details on reporting problems with the scripts. Did you do this? What was the response? It would probably be best to help fix this in such a widely-used script if it is indeed a problem at that end.
Foreign language text arrives as gibberish. (And I'm not the only person to report this.)
Do any of the users report success? Are all the errors limited to those using MS Outlook? Did you check that the message headers regarding encoding are correctly set? All this would be good info.